operating cost is negligible compared with the daily loss of time and schedule. Not only the ship also the containers aboard are exspected somewhere,,just in time delivery comes to mind !!!!
The waiting chain behind is much worst !!!
operating cost,, well crew is relative cheap,, the fuel consumption is of course depending on how much KW is needed to run live-reefers for example,,, but overall a rather low cost compared to what one thinks.
the fuel consumption is the highest cost for such ships,,but the main engine is stopped, therefore again most probably rather low with what one might think because of the size of the ship
What is not in the picture the Insurance and financing costs,,those can run rather high